Hot-water-dispensing device



o GRAETZER HOT WATER DISPENSING DEVICE med may 19, 1925 Patented Oct. 26, 1926.

Hor-wATEn-Drsrnnslno nnvrcn.

.; z ;Am;1}catin mea may: ia'ieza'seriai No. amaai-and inpswitzerlana .rune 5, 1924.

Myz-inventiona refers electr-ic heaters, more especially in connection; with the tap cock of a water piping. It is an objectaofx myainvention'to lprovide afwater heater which will allow tapping hot or Coldwater' as Adesired without requiring anyy switchingv .on vor .olf `of the electric current.

In liquid heaters xas hitherto designed in' which the water whilepassing through the heater is heated by theV electric current, means have been lprovided'for displacing the heater with respect to the tap cock so that thepres-l sure acting on the water in the pipe line does no more act on the heater and at the same time hot or-cold water can -be tapped at will. These heaters are provided lwith re-V zfsistance wires and ,require a switch for the cutting 1n andout of the electr1c'current.

In case that the current is switched on before the water is turned on and passes through the heater or if the circuit is closed vby error after cutting off thewater supply the resistance wires will burn through thusf rendering the device inoperative. This drawback is the more important as'devices of this kind are handled mostly by women 'devoid of all technical knowledge.

These prior devices involve the further drawback that the .resistance wires are first required to heat the metal sleeve surrounding them, which in its turn will then heat the water. This arrangement involves comparatively heavy losses of current. Moreover the danger of the resistance wires being destroyed is the greater inasmuch as after a Short while the sleeve will be covered with 'a coating of lime and other calcium salts which prevent convection of heat from the sleeve to the water.y All these drawbacks are avoided in the heater according to the present invention in which the resistance t 1.- wires 4are replaced by carbon electrodes, the heater being moreover mounted below the tap cock in such manner as to be easily turned-aside in a well known manner.

In the drawings aflixed to this specification and forming part thereof several water heaters embodying my invention are illustrated diagrammatically by Way of example. In the drawings- Fig. 1 is a vertical section of a heater 111g.. 111i l is;.=a,similar view. of the heater mountedl 2in1 position below the tap cock of 55 a.waterreservoir. f Fig. .3 is :a side elevation of the heater andy tap cock in which the heater is operativelyJconnect/ed with the screw down valve ofthefcock in such manner that on the heater being turned to the right or left the valve willbe either closed or opened.

AFiga i's-adiagrammatic plan view showinglthe= di-Eerentpositions of the heater `Referring first to Fig. l of the drawings, 1,;isthe, electric heater, the details of construction of which do not form part of this inyentionggfdnd need not be described in particular.; 'l` he heater is suspended from an arm 2O having mounted on its end a nut 2.-capable of "vertical displacement on the threadedbolty 2a, carried by a bracket 4 which is mounted to the rear of the tap cock 3. Counter nuts l0 and ll serve for limiting the. turning movement of the heater. Water escaping from the tap cock 3 will freelypass through a funnel 8 into the coiled pipe 2l vand from there into a boring 22 ofthe inner carbon electrode 7. Branches 23 =lead from this boring to the annular s0 space 2a between the electrode 7 and the outer cylindrical carbon electrode 6. The water after having passed through the space 2-,leaves the heater through the coiled bottom pipe 2 5. e

Obviouslyvby providing the open funnel below the tapv cock instead of tightly connecting the heater with the cock, the water enters the heater without -any excess pressure. The'carbon electrodes 6 and 7 being 90 connected to a wall vplug 5, the water passing-.through between them will bridge the i mountedibelowthe tap cock lof a water pipgap between them and in doing so will be I being turned totheiet't orto the:riglrt,theA arm 13 will move the handleffZpf the cock.;

tion with a water reservoir, such asshownat 15 in Fig. 2, the heaterbeing. arranged for horizontal movement" below 'the l"tap cock 16.

13 provided with a handle 14. The end of thisfiariuis operatively :connected `vvith;.theE handle 12 of the screw down valve or' tap..

cockv 3 iii-.such mannerthatoirrthe heateril so 'as-sto eitherclose or'pen the valve. .':j lVith lthefheater.in the position I in'Fig.

4i no: Water can'escape. I -W-ith the y'heat/eri turnedI Iinto f the 4position' lII, thevaflve will be opened partly :andwill allowy vwater to low through 'Jthe 'heaterl at comparatively low f speed, 'the 'water being;y Aheated. therein.

By'turning the/heater into the-'position' III in Fig.' 4 the valvel-willbe opened further' and a vigorous flow 'of cold Water beestablishe'd-fronifthe cock. v 'l Preferablyl the supporting means for Athe Y will heater includingl arm 20, nut-2 andfarmf 13 i diameter'ithan the upper coiled-pipe 2'1tfhel water 'will be dammed up 'between the electredes' andp'and in? consequence thereof: "the gap'between'the electrodes can be'niade considerably wider. In consequence 'thereof the-water can'then be heated to boiling teniperaturejwithou't any danger of short-cir-` cuitingi i In; this case moreover, the surfaces ofthe concentric electrodes need not be smoothed and no `correct centering of the electrodes is required whereby the first costs are-considerably diminished.

"In all theV modifications Vof the heater shown in the drawings the circuit is closed byv the Water flowing through the lgap between .the electrodes and in consequence thereof'ivhenever' the water is turned oi no overheating f ofthe 'heater can occur, inasrn'uchas then the gap ,betweenfthe elec-` trodes is no more bridged,` the circuitbeing thus interrupted automatically. All switches or the like can-'therefore be dispensed with.

Iwish" it to be understood that I do not desire'to be limited to 'the exact4 details lof constuction'shown and described, for ob- BESTAVAILABL 'CGMI 5 ing .a-tapcoclrand an electric heating device In the modification illustrated 1n Fig. 3 the heater hasmountedfthereona curvedarmr* below said cock comprising a pair of electrodes separated byi'a gap and adapted to be rendered operative by the water from said 'cockgfsaid heating devicelbeing movable .out offreach of' the Water .escaping from saidv4 cock'.`;f 1 'i .A fw

23: Hot "water Adispensing device comprising-ay tap cock and anelectric.'heatingde. vice below said cock adapted to -be rendered a operative by thewwater rom'said cock, said. heatingzdevice being. movable out of rea-ch of therwater escaping rom'fsaid4 cock and a connection between said'heating device and said cock whereby this latter isopened when I said device is moved `in one, and Aclosed whenever it isy movedy in the vopposite directi'on;y l f 4. Hot water dispensing device comprising a tap cock,` an electric heating .device below said cock 'comprising a 'pair of `electrodes separated by 'a `gap and adaptedto be rendered operative by the-water from said cock,

said heating device- 'be-ing movable out ot reachof Ithe water -escaping from said cock' and 'adrain pipe forming part'of said-heating device. 'the 'diameter of 'said drain ypipe being siichthatthe water flowing from-said tap cock 'into said heating device is dammed up between said electrodes.

5. Electric heater comprising a 'pair -of electrodes'se'parated 'by a gap, means forsupplying said electrodes with electric current, a cciled'pipe ori-the entrance side of said gap and another coiled pipe on the exit side of l the gap, the diameter vof said' latter pipe beingr smaller than lthat of the first pipe.

A6. Elec-tric V'heating system comprising al tapc'ock, a valve forming part of said cock,' anlelcctric heater monntedrbclowsaid cock for horizontal ,displacement around the axis of said Ivalve and an operative connection between said'heater and said valve whereby said valve is'ogened and closed, `respectively, when said heater is turned to one and the other side, respectively. f *In testimony'whereof, I aiiix my signature. 

